i take it to be her singing about her ex who's getting with some hussy so she's spread the rumours and in the song she's disclaiming that she started them but then when that doesnt work she's like just cos i said it, dont mean that i meant it blah blah then the last line someone's been spreading rumours back about her cos she's now with someone new too but rumour has it she's leaving him for her ex
i take it to be her singing about her ex who's getting with some hussy so she's spread the rumours and in the song she's disclaiming that she started them but then when that doesnt work she's like just cos i said it, dont mean that i meant it blah blah then the last line someone's been spreading rumours back about her cos she's now with someone new too but rumour has it she's leaving him for her ex